Citibank — citibank credit card emi variation

Address:

Raigad, Maharashtra, 410210

Sir, i have purchased carrier 1.2 ton 5 star split ac from flipkart on dated 31 dated 2017 (Order id:- od[protected] on following offer applied.
1. No cost emi on citibank credit card ₹1793
2. 10% cash back on citibank credit cards maximum 2000
3. Extra 2000 off.
After applying these offers the final price of product cost me ₹28206 along with no cost emi emi showed ₹3134 for 9 months but when i get my citibank credit card statement for the month of june and july'17 amount of emi showed ₹3216 and ₹3333 respectively. When i contacted to flipkart about the issue flipkart told me that they could not do anything talk to citibank after that i spoke to citibank 2 times about the deduction the executive told me that according to rbi guidelines they couldn't sell product on zero percent intrest rate and the intrest which is 15% charged for 9 months which is equal to ₹1793 and will be given as cash back and ultimately product would be cost you zero percent emi. On this discussion i couldn't understand the no cost emi offer and earlier i have purchased many products on no cost emi by several cards never happened this before. So please help me to resolve this matter.
Card no. [protected]
Vishal singh negi
Regards